Macs that have macOS 10.12.1 or later should have no problems with the expiration of this certificate. The factor that separates Macs that can and Macs that cannot visit those such sites is the macOS version that each machine has. Many popular sites use this certificate and once it has expired, some (not all) users stopped being able to visit those sites. Though the error/warning messages that get shown in the browser may differ, the underlying issue stays the same and that is the recent expiration of the widespread DST Root CA X3 certificate, created by the non-profit organization Let’s Encrypt.
Another one is “ Your connection is not private” or “ Attackers might be trying to steal your information”. The error message shown may vary – “ DST Root CA X3 expired” is only one possible error message. Recently, many Mac users have started reporting the same problem with their browsers, namely, the appearance of an error message while trying to visit certain sites.
The DST Root CA X3 expired on Mac error prevents users from visiting sites that use Let’s Encrypt certificates. Manually installing the ISGR Root X1 certificateĭST Root CA X3 expired on Mac is an error that many Mac users have likely started seeing in their browser since the 30th of September.
